from fastapi import FastAPI, UploadFile, File, Form, Request
from fastapi.responses import HTMLResponse, JSONResponse, FileResponse
from fastapi.staticfiles import StaticFiles
from fastapi.templating import Jinja2Templates
from fastapi.middleware.cors import CORSMiddleware
import tempfile, os

from app import summarize_document
from appImage import caption_image

app = FastAPI()

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.mount("/static", StaticFiles(directory="static"), name="static")
app.mount("/resources", StaticFiles(directory="resources"), name="resources")
templates = Jinja2Templates(directory="templates")

# Serve homepage
@app.get("/", response_class=HTMLResponse)
async def serve_home(request: Request):
    return templates.TemplateResponse("HomeS.html", {"request": request})

# Summarize endpoint (calls summarize_document from app.py)
@app.post("/summarize/")
async def summarize_api(file: UploadFile = File(...), length: str = Form("medium")):
    try:
        result = await summarize_document(file, length)
        return JSONResponse(result)
    except Exception as e:
        print(f"Error during summarization: {str(e)}")
        return JSONResponse({"detail": f"Internal server error: {str(e)}"}, status_code=500)

# Captioning endpoint
@app.post("/imagecaption/")
async def caption(file: UploadFile = File(...)):
    try:
        result = await caption_image(file)
        return JSONResponse(result)
    except Exception as e:
        print(f"Error during captioning: {str(e)}")
        return JSONResponse({"error": f"Image captioning failed: {str(e)}"}, status_code=500)

# Serve audio/pdf files
@app.get("/files/{filename}")
async def serve_file(filename: str):
    filepath = os.path.join(tempfile.gettempdir(), filename)
    if os.path.exists(filepath):
        return FileResponse(filepath)
    return JSONResponse({"error": "File not found"}, status_code=404)